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Control action is
too fast
Setpoint compensation
Settings
114/226
Building Technologies
HVAC Products
If the control's response is too "hefty" so that it overshoots or starts oscillating, setting
parameters Xp, Tn and Tv must be increased in a stepwise fashion. A new readjust-
ment should be made only after the control action resulting from the previous readjust-
ment is completed.
TBo
1.
Reduce Xp in steps of about 25 % of the previous value.
2.
Increase Tv in steps of 2 to 5 seconds.
If this is not sufficient:
3.
Increase Tn in steps of 10 to 20 seconds.
7.8.5
External burner control
The RMK770 delivers a DC 0...10 V signal as a boiler temperature setpoint for an ex-
ternal boiler temperature controller.
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Outputs > Setpoint compensation > Boiler ...
Operating line
Setpoint at 0 Volt
Setpoint at 10 Volt
Limit value
Using setting parameters, the DC 0...10 V output can be matched to the recipient of the
heat demand signal. For setpoints below the limit value, the modulating output delivers
a signal of DC 0 V.
7.9
Protective boiler functions
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler > Limitations
Operating line
Boiler temperature max
Boiler temperature min
Optimization min boiler temp
Boiler return temperature min
Cons overrun time
Frost prot boiler pump
Protective boiler startup
Protective boiler startup
Lock sig maintained boil ret temp
Delta boiler temp max (stage 2)
Boiler Sequence Controller RMK770
7 Boiler temperature control
Range
–150...50 °C
50...500 °C
0...140 °C
Range
25...140 °C
8...140 °C
On / Off
---- / 8...140 °C
0...60 min
On / Off
On / Off
Pump on / Pump off
None / Uncritical / Critical
0...10 K
TBoSetp
t
Factory setting
0 °C
100 °C
10 °C
Factory setting
95 °C
10 °C
On
---- °C
6 min
On
On
Pump on
Critical
1 K
CE1P3132en
01.03.2005
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